Each state has its own DMV with different rules, procedures, forms and regulations compared to other states. Because of this, you should look at the map below and click on the state in which you live. Following the link will provide you with information specific to your state, such as the locations of nearby DMV offices, as well as their contact information and user ratings.
In the state specific sections you will also find a number of forms which you can download, print, and fill out in the comfort of your own home. Additionally, some tasks which used to require you to visit the DMV, such as requests for driving records, can now be done completely online, and you will find links these resources by following your state's link on the map.
The reason it is important to know the contact information of your local DMV is because it will expedite the resolution of things such as licensing, registration, titling and traffic violations. If you actually need to to go to the DMV in person, it's probably a good idea that you check their office hours beforehand. This information is also available by finding your state on the map and clicking on it. Few things are worse than waiting in line for a long time only to find out that the office is closing just as your turn comes. In order to avoid such situations you should look at the office hours and plan your visit ahead of time. In fact, an even better option is to go to your state specific section and see if what you wish to do is already accessible via the Internet. If what you want to do at the DMV office can be done online then you have just saved yourself a trip to the DMV office.